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Andrew Shu

Engineer, a founding CTO of the online printing company Printivity, and Director at Permiso Security. I'm also a lifelong tinkerer and doodler who loves to learn and experiment. Building something in the vibe coding space.

📍 SF Bay Area https://www.ashu.co

Tips for developers to use agents to improve security

I don't know about you, but I spent the last week tightening up my security. Given the acceleration of exploits and reconnaissance in October, we should spend a bit more on safety. First things first, CVE-2026-98432 is a critical vulnerability in the Linux kernel. It'

Scaling agents locally with Incus, Ansible, Tailscale

I describe how I view the problem of filesystem isolation with untrusted agents, and how I use Incus VM's to unblock my memory problems and improve security.

Save tokens by turning chats into Skills and scripts

Automate repeated agent tasks into Agent Skills to reduce token costs, execution time and improve consistency. Scripts can push this further.

Tokenmaxxing vs Subscriptionmaxxing

Subscriptionmaxxing is both about saving money and about still finding ways to use up your tokens. Be efficient while maximizing output.

Parallel agents are key to productivity

I'm of the opinion that parallel and background agents are key to how agentic coding improves our productivity. "How do I productively get to 2 parallel agents?" "Juggle 4 agents?" "Coordinate 10+ agents?" I enjoy discussing with other engineers about how they

Announcing Branchmore private beta

Branchmore is the feedback loop for engineers coding with AI. We turn the illusion of productivity into something you can actually measure and optimize.

How I use Obsidian across Claude Code and other AI tools

I use Obsidian to collect the output of Claude Code and other AI tools to feed as input in new chats to save time and improve AI memory in a learning loop.

How I Reduce AI Coding Agent Hallucinations

When I hit a hallucination that annoys me, I've trained myself to pause and run through a short checklist.

Day 2 of vibe coding in production: challenges in your team's process

Your team adopted AI coding tools and velocity went up. Here are the Day 2 process problems that emerge in production: code review, ticket quality, duplication, uptime, and security. And, what to do about each.

Measuring AI coding adoption: What I learned as a manager

Increasing AI adoption is common objective for engineering managers. Beyond qualitative surveys, what else can we do?